[time-nuts] Re: MHM-A1 maser temperature stabilization

[ed breya]

Hi Bob,

I think what may be missing is the unknown thermal resistance of the 
outermost insulation surface to the ambient air. This can be very messy, 
but could be estimated experimentally on an actual thing, including the 
conduction, radiation, and convection effects. If there's a draft in the 
room, then it's a different deal.

Deleting the foam, say, takes out its 0.04 deg C/W of resistance, but 
doesn't short it to ambient temperature. If it were in a water bath or 
heavy metal outer box held at Ta, it would be a different story, but 
here the air interface is the big part.

Ed